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(No Model.)

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PENDULUM ESUAPEMENT. V

No. 284,788. Patented Sepmll, 1883.

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1 Nrrno STATES- ATENT FFICE.-

CLARENCE OTIS lVI-HTE, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE- HALFTO HASTINGS H. JOHNSON, OF SAME PLACE.

PENDULUM-ESCAPEMENT.

SPECIFICATION forming part of Letters Patent No. 284,788, datedSeptember 11, 1883.

(No model.)

To all whom it may concern Be it known that I, CLARENCE OTIS \VHITE, acitizen of the United States, and a resident of Minneapolis, in thecounty of Hennepin, in the State of Minnesota, have invented certain newand useful Improvements in Pendulum- Escapements, of which the followingspecification is a full, clear, and exact description, reference beingalso had to the accompanying drawings.

This invention relates to the escapements of the pendulunis of clocks,motors, clock-pumps, and similar mechanical apparatus and instruments;and it consists in the construction and arrangement of parts hereinaftershown and described, and then sought to be specifically defined by theclaims.

The improvement may be applied to almost any kind of mechanism in whicha vibrating pendulum is used; but for the purpose of illustration I haveshown it attached to the mechanism for regulating the-stroke of aclockpump in the drawings, in which-* Figure l is a front elevation, andFig. 2 is a plan View, of the regulating mechanism. .Figs. 3 and 4 arefront views of the escapementwheel and a portion of the pendulum,showing the relative positions of the parts at the extreme right andleft points of the stroke of the pendulum. Fig. 5 is a perspective viewof the pendulum-head detached. Fig. 6 are enlarged detail views of oneof the escapement-wheel pins detached.

- A is a frame mounted upon any suitable base in an elevated position,having a horizontal shaft, B, running in suitable bearings in its upperpart. 0 is a gear-wheel fast upon this shaft B, and adapted to engagewith a train of gears and pinions, G" O C C 0, upon shafts B B 13*. Theshaft B has a drum, D, fast upon it, on which a cord, m, is wound, thecord having-a heavy weight (not shown in the drawings) attached to itslower end, and E is a crank upon the outer end of the shaft 13*,connected by a rod, F, to the plunger of a pump, the weight on the cordthus acting as a power to revolve the crank a longer or shorter time,according to the length of the cordm. The gear-wheel O is loose upon the5o shaft B and is provided with a clutch, G, so that while the wheel isadapted to be revolved by the shaft when moved in one direction itrevolves aroundthe shaft loosely when revolved backward, so that thecord m may be wound upon the drum D by a key-wrench 5 placed upon thesquare head I) of the shaft B H is an escapement-wheel secured to theshaft B, and provided with a series of pins, (1.. a a a a a a aprojecting from its outer face near the rim, at equal distances apartand 6( equidistant from the shaft 13".-

K is a pendulum, pivoted at cl to the frame A, and having an enlargedhead, K on its upper end above its pivot, and an adjustable weight, K onits lower end.

c is a pallet secured to or formed in one piece with the head K andprojecting from the upper edge of the face of the head toward andnearlyto the face-of the escapement-wheel H, as shown, and is a little morethan one- 7( half as long as the head K is wide, as shown in Figs. '3and 4. The upper surface, of this pallet is convexly curved concentricwith the pivot d, on which the pendulum oscillates. e is another pallet,pivoted at c to the face of the head K leaving a small open space, 0, alittle, wider than the width of one of the pins on the escapement-wheelH, between its inner edge and the inner end of the pallet e. The uppersurface of the pallet e is somewhat inclined, and is preferably concave,as shown. The lower end of this pallet e is provided with a small slot,0", through which a 'setscrew is screwed into the head K so that thelower endof this pallet may be adjusted nearer to or farther away fromthe center of the head K, as hereinafter shown.

A spring may be used in place ofthe weighted cord and drum, or any othersuitable power to revolve the wheels, if preferred; or the mech- 9canism may be applied in any other suitable manner than that shown.

In Fig. 1 the pendulum is shown in a perpendicular position, with thepin a on the escapement-wheel H resting upon the pallet e. The pins willretain this position as long as the pendulum remains stationary, and theescapement-wheel H will also remain stationary when the pendulum isswung to the left, as shown in Fig.. 3, the upper edge of the pallet 1cc merely riding beneath the pin a, and not altering the position of theescapement-wheel H; but as the pendulum returns, when the open space 6*passes beneath the pin a, the weight on the cord m, constantly pullingdown, will cause the escapement-wheel H to revolve and cause the pin ato travel down along the inner curved edge of the pallet 6. This willcause the pin a to come around to the upper edge of the head K butbefore it reaches the head the pin a, acting on the pallet e will swingthe head K of the pendulum and more the open space e* over toward theshaft B, so that the pin a will be caught and held by the pallet Then atthe next stroke the pin a will fall into the open space 6*, and so on,each stroke of the pendulum permitting the escapement-wheel H to revolvethe distance of one of its pins. By this construction only one pinescapes at each double oscillation of the pendulum, and this whatevermay be the distance between the pins. By adjusting the pallet e" at itslower end the time of contact of the pins on the escapement-wheel Hwiththe face of the pallet will be increased or decreased to i11- crease ordecrease the throw of the pendulum, orby adjusting the weight K higheror lower the strokes per minute may be increased or decreased to adaptthe device to diiferent uses or kinds of work. As many of the pins maybe used upon the escapement-wheel H as desired. The pins of theescapement-wheel H are formed isshown in Fig. 6, which represents an end1nd side view of the pin detached and enlarged. They are formed withcurved surfaces parallel with the escapementwheel, so ;hat they will bein contact with the whole sur- "ace of the pallet 6- while in contactwith it to ecure uniformity of wear, and the pins will he made square orpolygonal where they pass :hrough the escapement-wheel H, so that theyzannot turn therein, and will be secured by a screw and nut, so as to beeasily taken out for repairs or to permit the removal of every alternatepin to increase the speed of the escape ment-Wheel H, if desired.

I claim as the principal advantage of this construction of theescapement the superior ability to regulate and govern the speed ofgearing operated by Very heavy weights or springs, as the pins on theescapement-wheel ,H bear directly downward upon the pallets,

and the arrangement of the latter is such that any decrease of motion orstoppage will at once throw the pallet 6 over beneath one of the pins011 the escapement-wheel and stop the machine, and hold it stationaryuntil again set in motion by the operator.

I have found by experiment that a twentyi'our-inch pendulum, K, with athree-pound weight, K, is sufiicient to control a weight of one thousandpounds on the cord m.

Having described my invention and set forth its merits, what I claimis- 1. In a pendulum-escapement, the combination of the pendulum K,having apallet, c, the whole bearingsurface ofwhich is concentric withthe pivot of the pendulum, and apallet, e", the whole bearing-surface ofwhich is inclined or eccentric to the pendulum-pivot, with theescapement-wheel H, the pins of which are adapted to be stopped by theconcentric pallet and to throw the pendulum by the eccentric pallet, forthe purpose herein specified.

2. The combination of a pallet, c, fixed upon the pendulum, and aninclined pallet, 6 adjustable to different inclinations on the pendulum,substantially as and for the purpose herein specified.

In testimony whereof I havehereunto set my hand in presence of twosubscribing witnesses.

CLARENCE OTIS \VHITE.

\Vi tn esses I (3. N. VVOODWARD, LoUIs Fnnsnn, Jr.

